LLM Comparison

GPT-5.4 Nano vs Sonar Reasoning Pro

Side-by-side specs, pricing & capabilities · Updated October 2026

Price vs Intelligence

5951433528$0.51$2.01$3.50$5.00$6.50Avg Price per M tokensIntelligenceGPT-5.4 Nano37.5 / $0.72Sonar Reasoning Pro49 / $5.00

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2/6 models
Same tier:
 OpenAIGPT-5.4 NanoPerplexity AISonar Reasoning Pro
OrganizationOpenAIOpenAIPerplexity AIPerplexity AI
OpenTools Score
38
51.7
49
9.8
FamilyGPTSonar
StatusCurrentCurrent
Release DateMar 2026Mar 2025
Context Window400K tokens128K tokens
Input Price$0.20/M tokens$2.00/M tokens
Output Price$1.25/M tokens$8.00/M tokens
Pricing NotesCache read: $0.0200/M tokens—
Capabilities
textvisioncode
textvisioncodeextended-thinking
Training CutoffAug 31, 2025—
Max Output128K tokens—
API Identifieropenai/gpt-5.4-nanoperplexity/sonar-reasoning-pro
Benchmarks
Artificial Analysis Intelligence Index v4.3
21.2442artificial-analysis
—
GPQA Diamond
81.7172artificial-analysis
62.3perplexity
SciCode
47.2222artificial-analysis
—
Terminal-Bench 2.1
60.6742artificial-analysis
—
MATH-500—
92.1perplexity
AIME—
77perplexity
MMLU Pro—
79perplexity
 View GPT-5.4 NanoView Sonar Reasoning Pro

Cost Calculator

Enter your expected monthly token usage to compare costs.

ModelInputOutputTotal / movs Best
GPT-5.4 NanoCheapest$0.20$0.63$0.83—
Sonar Reasoning Pro$2.00$4.00$6.00+627%

OpenAI

GPT-5.4 Nano

GPT-5.4 Nano is a multimodal llm from OpenAI. Supports up to 400,000 token context window. Available from $0.20/M input tokens.

Perplexity AI

Sonar Reasoning Pro

Sonar Reasoning Pro is a multimodal llm from Perplexity AI. Supports up to 128,000 token context window. Achieves 83.0% on MMLU. Available from $2.00/M input tokens.

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